I'm not generally a vindictive person, but I do like to get my own back. Not in a nasty way, but in a way that amuses me, usually without the person involved even knowing. Let me explain...
When I worked in the funeral directors, we had other smaller branches in different areas of the county. As ours was the main branch, we had 'in' trays for the other branches, and the people that worked in them would often pop in to collect anything from their trays.